Abstract
A novel onoceranoid triterpene, named lamesticumin G (1) along with four known compounds (2–5) were isolated from the ethyl acetate extract of the fruit peels of Lansium parasiticum. The structure of lamesticumin G (1) was fully characterised using spectroscopic data. Lamesticumin G (1) inhibited α-glucosidase (maltase) with IC50 value of 2.27 mM, while 2–5 showed no inhibition.
![](/cms/asset/16f71c48-06b0-470c-9c2f-34e9d7f846f2/gnpl_a_1354184_uf0001_oc.jpg)
Acknowledgements
TP is grateful to Nantaporn Surachaitanawat and Dr Rico Ramadhan for technical assistances. WW gratefully acknowledges the graduate School of Chulalongkorn University for a Postdoctoral Fellowship (Ratchadaphiseksomphot Endowment Fund).